TRANE 18-HD100D1-1A-EN 8 Port Distribution Board Installation Guide
- June 13, 2024
- Trane
Table of Contents
8 Port Distribution Board
**Installation Guide
**
With Link technology
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL
CODES.
IMPORTANT – Proper application is critical when installing zoning
systems. Not done correctly, the HVAC and zoning system will not provide the
expected comfort. Reference application bulletins CNT-APG003-EN/Trane and CNT-
APG004-EN/AS for detailed information on Zoning Application.
IMPORTANT – This Document is customer property and is to remain with this
unit. Please return to service information pack upon completion of work.
These instructions do not cover all variations in systems or provide for every
possible contingency to be met in connection with the installation. Should
further information be desired or should particular problems arise which are
not covered sufficiently for the purchaser’s purposes, the matter should be
referred to your installing dealer or local distributor.
Safety
WARNING
This information is intended for use by individuals possessing adequate
backgrounds of electrical and mechanical experience. Any attempt to repair a
central air conditioning product may result in personal injury and/or property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
WARNING
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and troubleshooting of this product,
it may be necessary to work with live electrical components. Failure to follow
all electrical safety precautions when exposed to live electrical components
could result in death or serious injury.
General Information
The 8X distribution board is required to isolate the transformer loads.
-
The Indoor unit, outdoor unit, and air cleaner should be powered from the indoor unit transformer.
-
Furnaces will require the installation of the 50VA transformer when incorporating an electronic air cleaner.
The Link control components (system controller, thermostat and zone panels) will be controlled through the secondary transformer.
The transformer that powers the zone panels will also power the dampers. -
This wiring technique separates the system loads from the zoning loads; allowing each transformer to control the dedicated components.
Component Wiring
Control wiring is more challenging if a secondary transformer is needed. The 8X distribution board will also be required to isolate the transformer loads.
-
The Indoor unit, outdoor unit, and air cleaner should be powered from the indoor unit transformer.
-
Furnaces will require the installation of the 50VA transformer when incorporating an electronic air cleaner.
The Link control components (system controller, thermostat, and zone panels) will be controlled through the secondary transformer. The transformer that powers the zone panels will also power the dampers. -
This wiring technique separates the system loads from the zoning loads; allowing each transformer to control the dedicated components.
8X Distribution Board
The 8X distribution board provides eight connection points for Link
communication and the 24-volt power source.
The bottom of the distribution board has two dedicated headers for the
secondary transformer and connection to the indoor unit.
Ports one through seven are to control devices from the second transformer
load.
The bottom left header must be connected to the communication circuit from the
indoor unit transformer whenever the calculated load requires the installation
of a second transformer.
This connection provides Link communication to the distribution board and
extends this communication to all devices connected to the 8X distribution
board.
Notice the 24V R is not connected to port 8. This break in R eliminates the
need for transformer phasing.
Notes:
- Since the two 24VAC transformers are isolated, phasing is not a concern.
- Do not ground the secondary side of the second transformer.
- Leave this secondary voltage floating.
About Trane and American Standard Heating and Air Conditioning Trane and
American Standard create comfortable, energy efficient indoor environments for
residential applications.
For more information, please visit www.trane.com or
www.americanstandardair.com
The manufacturer has a policy of continuous data improvement and it reserves
the right to change design and specifications without notice. We are committed
to using environmentally conscious print practices.
Representative-only illustrations included in this document.
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18-HD100D1-1A-EN 03 Aug 2023
Supersedes (New)
© 2023
References
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